| H | A | B | T | V–BARS | X–BARS |
|---|---|---|---|---|---|
| FT.–IN. | IN. | FT.–IN. | IN. | ||
| 3'–4" | 8" | 2'–4" | 9" | NO. 3 AT 32" | NO. 3 AT 24" |
| 4'–0" | 10" | 2'–9" | 9" | NO. 4 AT 32" | NO. 3 AT 24" |
NOTES:
- CONCRETE FOR FOOTING TO BE CLASS "A" (6 SACK 3000 PSI) WITH 3/4" AGGREGATE AND 4 INCH MAX. SLUMP.
- FILL ALL CELLS WITH 7 SACK CONCRETE WITH 3/8" AGGREGATE OR 3:1 MORTAR.
- DOWELS SHALL BE SAME IN SIZE AND SPACING AS V-BARS. THEY SHALL PROJECT 40 BAR DIAMETERS, 24" MIN., INTO THE CELLS AND EXTEND TO THE TOE OF FOOTING.
- WALLS SHALL NOT BE BACKFILLED UNTIL 7 DAYS AFTER CELLS ARE FILLED.
- WALLS OVER 100' LONG SHALL HAVE VERTICAL EXPANSION JOINTS. WALLS OVER 50' LONG SHALL HAVE VERTICAL CONTRACTION JOINTS. SEE AGENCY ENGINEER FOR DETAILS.
- NO CONCRETE SHALL BE PLACED UNTIL FORMS AND STEEL HAVE BEEN INSPECTED AND APPROVED BY THE AGENCY ENGINEER.
- BLOCKS SHALL BE GRADE N OR BETTER (f'c=1,500 PSI).
- NO FRONT FACE WEEP HOLES ALLOWED IF SIDEWALK OR PAVEMENT SLOPES AWAY FROM WALL.
- SUBJECT TO THE APPROVAL OF AGENCY ENGINEER, DESIGN FOR DRAINAGE CONVEYANCE BEHIND WALL MAY BE MODIFIED TO UTILIZE PREFABRICATED DRAINAGE DEVICES.
UNIFORM STANDARDS
ALL CITIES AND
COUNTY OF MARIN
RETAINING WALL
TYPE "B"
SLOPING
BACKFILL
MAY
2008
DWG. NO.
155
| REV. | DATE | BY |
|---|---|---|